Stove



0d 20, 1931- v c. w. MUMMERY 1,827,951

STOVE Filed Sept. 7, 1926 .l 2 Shets-Sheet 2 y"25 tion; Y. 1 V- Fig. 2is a plan viewv vviththe lid open andl I Patented Oct. 20, 1931 Y *YPETEDSTATES;

inzien ,oLYDE WQ MUMMERY, or DETROIT, iniciar-:faul

srovE n Application iiledseptember '.7, 1926.v SerialA 116.134,011.V

This invention relates -to stoves ofthe type in which liquid'fuel isvaporized in a generator, mixed with air and supplied to severalburners; and it has for its principal ob- 5 jects to permit any one orall of lthe burners to be quickly put in operation', to permit thesupply of fuel to the burners to be quickly changed from high to low andvice versa, to

,Y improve the control of 'theflame as it issuesl 1'0 from the burner,to 'permit uniform generation in spite of drafts, to provide aconstruction that can be economically manufactured,

to make thecontrol of. the valves easily accessibleVK While beingprotected from injury, "1'5 and to provide an improved 'casing' forporta-` ble stoves. v "i j 'Further objects" f and advantagesfof theinvention Will be understood as the dis- Y closure proceeds and theV,description Vis read "2'0 in connection with the accompanying drawingsillustrating ai'preferre'd embodimentof` the invention,`and in which"YFig. 1 is a perspective'view of the improved stove Vready toA Vbe openedand Yset inoperabroken away; y f l y Fig. 3 is a transverse verticalsectional View taken on the line 3-3 of Fig.

Fig. l is a perspective view of a fragment of the stove illustrating themixer, its shield, f the distributingchamber and the feed pipes;

and f i Fig. 5 is a perspective view of a shieldfor protecting thegenerating flames.

In its preferred form the stove includes a generator burner 1Q,and'three 'other burners 11, arranged at the cornersfof' a square. Thefuel, preferably gasoline, is -carried in 40 a supply .tank 1 2,equipped With Aa pump 13 by Which pressure'may be puton the fuel toforce it through thefeedpipe 14 to the rgenerator'15, under the controlof the generator valve 16.l `The generator converts 'the fuel Y45 intovapor Whichissues from the nozzle 17 thereof into amixer, generallyindicated by A, from which it passes to',v a 'distributor chamber,generally indicated by B, and thencel through eed pipes 18 to theburners 50-10and11.-1"f- 7 The generator here shown is of oonventionalstructure. Thev valve 16`permits the gasoline to flow into the tube 19,Which is acted upon by flamesk lfrom lthe burner 10. The valve carries acleaning rod 20, which runsthrough the tube 19 and serves to keep",Y

the nozzle 17 always open for thefree flow of vapor When the valve 16isv open. p z The mixer'includes a casing, generally vindicatedv byC,.and a tube'21'leadin'g to the distributing chamber B. The tube is thelength of commercial tubing, to one end of Which is fixed an annulardisc 22, to which initurn is fixed a short length of larger tubing orpressed metal 23,- cut away` at `the bottom, as indicated at 24,v andperforatedv at" the frsides,as shown at 2.5, to provide forthel` freeadmission'of air.v The Aend, lof the casing C is form'e'd'by a disc26,"fixed to the Wall 23 in H any suitable manner, and perforated-at27to admit'the' vapor from the mixer. i

vThe mixer'isprotected by a shield, gener'-y ally indicated by D,Whichincludes sides 23 i connected by atop 29 and a back 3.0, the lat- Yter being perforated in alinement Withthe perforation 27 to receive'thenozzle 17. The; sides 2,8 straddle the mixer and the feedY for the pipes,18,` surrounded by inwardly tapering flanges 33 all lyinginsubstantially pipe 18leading` to the ygenerator'burner 10.

y .chamber B by preference V.1s composed of a piece ofrelatively largecommericial tubing 32, punched to from openings S the same planeand'lying along diagonals of the square at the'cornerstof lWhich the,vburners are arranged; 'The fuel pipes`18ware lengths of commercialtubing, slightly tapered at their inner ends and lpressed into theiianges `33. 'A similar connection is made betvveen the tube21 and theflange 5,7 The lends of ihe tube 32 are closed by vstamped heads'58,

pressed into the tubeand vheldin vplace by friction.f l Secured to` theouter ends vof the pipes V18 are burner castings, generally indicated byE,

lWhich form valveca'sings and the. base p0r-k tions of t-he burners.Each casting includes a substantially horizontal tubular portion 84 andan upwardly directed tubular portion 35, on top of which is a disc 36.The inner ends of the tubular portions 34 are counterbored to formslight shoulders 37, and the tapered Y ends of the pipes 18 are pressedto a seat against these shoulders.

A valve head 38 is mounted to move bre-'1 tween a closed positionresting against the" end of the tube 18, anda full open position i atthe oppositeV end of the tube, indicated by dotted lines in F ig. 3. TheValve head Vis swiveled on a stem 39,.which is rotatably and i slidablymounted in a short tube 40, threaded into the outer end of the tubularportion 84.

`The tube 40 has-a short external thread 41,

and the stem is equipped with a cup 42 having a corresponding internalthread 43. Very little rotation of thestem in-one direction serves toopen the valve and disengage the .cup from the sleeve, whenthe head canbe thrown to the opposite end of the `valve chamber,leaving the fuelpassage wide open. A

similar reverse Vmovement will almost close thefuel passage, when aslight rotation in the opposite direction will seat the valve andentirely close the fuel passage.1

Ordinarily no valve will be provided for the generator burner other thanthat which forms apart of thegeneratonas indicated The disc 36 receivesa ring 44, having a plu-v rality ofrows of perforations 45, and Von topof the ring is a disc-46, secured to the casting Eby stove bolts 47. Thedisc36 is provided `with a marginal flange48, presenting an up-V -wardlyandoutwardly inclined surface 4,9

tothe fuel and flame issuing` from `they perforations. The disc 46 has asomewhat similar, flange 50, of greater extentv but less in. clination.The two flanges combinexto make the flame cup or curve upwardly andstillprevent it from coming toostraight up'fromthe perforations whenvery` low. Y Y.

In the generator burner 10 the disc 51, cor-` responding to the disc 46in the other burners, is provided with a plurality of openings 52,belowwhich are perforated discs 53, which permit of a plurality of jetsof fuel andflame Ato issue upwar'dlyfrom the burner'and act `upon thetube of the generator. Inl order lto prevent uneven generation due todrafts of aira shield, generally indicated by F in burner. Theconstruction so far described is capable of use in stoves `for a varietyof purposes; It

.can be very readily manufactured fromfcommercial tubing, stampings andlight castings. The principles disclosed may be incorporated in stoveshaving a lesser or greater number of burners, and arranged to suitparticular conditions. Y Y i The distributing chamberB should berelatively large as compared with the feed pipes 18. Otherwise thevalve-controlled burners cannot be lighted until the generator burnerhasin a` measure warmed up the entire device. The relatively `largedistributor and the relatively small feed pipespermits any one br all ofthe burners to be lighted as occasion may require.

rl'he valve construction permits the burner to be quickly adjustedfroma'low llame to a high flame, by merely pulling or pushing the Valvestem. This is a decided advantage over prior constructions, where thevalve heads are moved slowly by the rotation of the Vthreadedhsteni andconsiderable time and labor are required to move the valve between fullopen and full closed positions.

The letter G generally indicates aca-sing or box Vparticularly adaptedfor use when the stove is to be portable'or is, what is conimonlyreferred`V to as, a camp stove. It is made ofsheet metalfand includesabottom 59 and a top 60.-, which forms the lid and is hingedv to swingfrom the'position shown in Fig. 1 to Vthat shown in Fig. 2. 1 The wallsof the casing comprise relativelylong sides` `61, connected by?,relatively short sides 62 `.at right angles tothe diagonals of the`square upon the cornersof which theV burners are arranged. Thisxhastheveect of chainfering or beveling the corners of theyrectangularfigure, and notonly eliminates the objectionable sharp edgelbut improves the appearance, and provides for the location of the valvehandles '63 within the angle formed by the projecting long sides 61 andstill outside the casing, where they can be `readily reached, andwherethe operators hand will be protected from the flame and the hotutensils by the wall ofthe casing. Y'

Y The fueltanlr 12 is secured along onev of the long sides 61 by straps64, which carry a handle 65 by whichthe entire organization can bereadily liftedand transported. .u

The straps are secured to apressedmetal frame` 66by rivets orV bolts 67.When the rdevice is. being carried by the handle 65, the

valve handles 63 are protected by the adjacent corners 68 formed bythelong sides 61 Four legs, 69, are pivoted in slips 70, and

may be swungfronr the position shown in Figs'1and 3 toa positionin whichthe` arms 71 lie flat against the bottom, and the braces 72`extendinside the casing along the burners. The tips 7 3 ofthe braces 72 springinto iso A U-shaped brace 77 has downturned n-V gers 78 at its ends,adapted to project',V through a flange 79 on the casing when thestove isin folded position. They will also project through holes 8O in the frame66 and.,

hold the brace in position to support the lid open and parallel to thebottom, thereby forming a shelf or table adjacent to the burners.

yUse has been made o-f specific description and illustration in order togive a complete and clear disclosure,'but it is not intended to therebylimit the scope of thepatent or require it to be given amore restrictedinterpretation than is made necessary by the prior art.

I claim as my invention- I l. In a stove, the combination of a generatorfor liquid fuel, a mixer receiving vapor from the generator, arelatively large distributing chamber to which the mixer deliversadjacent to the top and provided below with a plurality of lateraloutlets of small size compared with the chamber, a plurality of burners,and a supply pipe connecting each burner with a lateral-outlet. y

Q. In a stove, the combination of a generator for liquid fuel, a mixerreceivingvapor from the generator, 'a relatively large cylindricaldistributing chamber to which the mixer delivers adjacent to the top, apluralit)y of burners arranged around the distributing chamber, and aplurality of burner supply pipes connected laterally to the cylin'drical chamber and leading to the burners.

In a stove, the combination of a gener-v ator for liquid.fuel, a mixerreceiving vapor f' from the generator, a relatively large distributingchamber, a Vdelivery pipe connecting the mixer with the distributingchamber adjacent to its upper end, a plurality of burners arrangedaround the distributing chamber, and a plurality of relatively smallsupply pipes radiating from the distributing chamber tothe burners.

4. In a stove, a generator for liquidfuel, a

burner, and means for controlling the flow of fuel between themincluding a valve casing having a relatively long valve chamberthereinand a relatively short threaded portion, a

'valve head movable in the chamber, a stem connected with theV valve andhaving a corresponding threaded portion adapted to enlgage the threadedportion on the'casing when the valve is nearitsclosed position only.

5. In a stove, a burner including a bottom and top, and a perforatedring between them,

the bottom and'topeach having a flange 'surrounding the perforated ringpresenting an upwardlygand outwardly inclined surface to the i burningfuel issuing'ffrom the. ring,"the iiangeonthe top being ofgreaterfextentand all less inclinationthan the flangeon the bottom. .l

6. 'Ina stove, aburner having upwardly directed'flame openings, agenerator extending across the burnerfin the path of the flame' issuingvacross the burner in the pathof the flame v lssuing from said opening,anda shield comprising a disc mounted on the burner and having adiametrical arch extending over the generator. f 1

8. In a stove, the combination of a generator for liquidfuel, a mixerreceiving vapor from the generator, a plurality of burners, a

l distributing chamber comprising a length ofY relatively large tubingarranged upright andV connected adjacent to the top with the mixer, anda length of relatively small tubing adj acent the bottom'connecting thedistributing chamber with each burner.

9. In a stovea generator for liquid fuel,v

a relatively large distributing chamber, a

plurality of burners arranged around the dis-` tributing chamber, aplurality of relatively small pipes radiating from the distributingchamber to the burners, a mixer between the generator. and thedistributing chamber including. a tube entering the chamber, arelatively large casing at the end of the tube opposite tothe chamber,said casing being open at the bottom and perforated atthe sides to admitair and also being'perforated in alignment with the tube to receivevapor from the generator.

cli

' l0. In a stove, the combination of a burner.

and-means for controlling the iiow of fuel f Ainto the burner includinga valve casing havv ing a valve chamber therein, ya relatively shortportion of which casing is screw threaded, a valve head movable in thechamber, a stem connected with the valve head having a threaded portionadaptedto engage the corresponding threaded portion of the valve casingonly when the valve is operated adjacent its closed position.

1l. In a stove, the combination of a burner, j

and means f for controlling the flow of fuel into the burner comprisinga casing having a tubular valve chamber therein, a valve longitudinallymovable within the casing, complimentary screw threads on the valveandcasing enabling the valve to be moved from closed position toslightly open position by I rotation ofthe valve, said screw threadsbeing of such length only as to permit the valve to be moved fromslightly open to fully open position by anneke` rectilinear -thiustlonthe valve. J i l2. In4 a stove, the combination ofsarburnei',

a fuel conduit `for supplying vfuel to the' burn/13; anda VValveinterposed-in the Voonduit' to adjustably regulate the flow of fuel intothe burnensaid valve havinggraduated lmeans operable only by rotation ofthe valve foiinoving the Valve from Closed position to a positioninte'rinediatev the fully open position, and means associated therewithpermiti tingtlie-Valve to be'inoved, from' said last 1 namedposition'to` fully open position bya 1in-ear force acting along theaxisof thevalve.

v In testimony whereof- I afx my signature.

GLYDE NV. MUMMERY. Y,

